Smelting-furnace



(No Model.)

H. HUBER. SMELTING PURNAGE.

No. 572,011. Patented Nov. Z4, 1896.A

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ATTO/Ws rs UNITED STATES PATENT OFFICE'.

HERMAN HUBER, OF KANSAS CITY, MISSOURI.

SNIELTING- FURNACE.

SPECIFICATION forming part of Letters Patent No. 572,011, dated November24, 1896 Application filed June 22, 1895. Serial No. 553,669. (Nomodel.)

Be it known that I, HERMAN HUBER, of Kansas City, in the county ofJackson and State of Missouri, have invented certain new and usefulImprovements in Smelting-Furnaces, of which the following is afull,clear, and exact description.

The object of the invention is to provide certain new and usefulimprovements in smelting or stack furnaces whereby less draft isrequired when working the furnaces and the gases from the latter arecaused to rise uniformly and in passing to the downtake-ilue meet withcomparatively little resistance, so that the loss of precious metals inthe fumes and flue-dust is reduced to a minimum.

The invention consists principally of a removable hood adapted to be seton the top of the stack and provided with a line for connectin g withthe downtake-flue separate from the stack.

The invention also consists of certain parts and details andcombinations of the same, as will be fully described hereinafter, andthen pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both the figures.

Figure 1 is a sectional side elevation of the improvement, and Fig. 2 isa plan view of the same.

The smelting-furnace is provided with the usual stack A, having theusual outlet-open ing A closed, and the stack is formed at its i upperend with the charging-floor B and adapted to be closed by a hood C, madeof sheet metal or other suitable material and hung on a tackle D,mounted to travel on a suitable overhead beam E, so that the hood C canbe raised and lowered to one side whenever it is desired to give accessto the stack in the process of barring down-.that is, removingaccretions from the walls of the stack.

On the charging-door B are arranged angular sockets B', adapted to formseats for the corners of the hood C to fit the latter snugly in placeover the upper end of the stack A. The hood C is provided with acounterbalanced door F, mounted to slide verticallyin suitable guidewaysarranged on The curved top of the side of the said hood.

the hood is provided with a downwardly-extending flue C', opening withits lower end into the top of a downtake-flue G, built on the stack Aand leading to a dust-chamber H of usual construction.

Now it will be seen that by the arrangement described the gases risingabove the charge in the stack A readily pass into the hood C and fromthe latter are deflected into the nue C to pass through the downtakeflueG into the dust-chamber H without encountering much resistance, so thatthe furnace can be worked with considerable less draft than thoseheretofore used and Without causing the furnace to smoke on reduction ofthe draft. Y

It will further be seen that the gases from the top of the charge in thestack Acan rise conveniently into the hood C to be deliected into theflue C', so that the loss of precious metals contained in the fumes andflue-dust is reduced toa minimum. A more regular and uniform dischargeof the products of oombustion is thus provided and irregular heating ofthe charge avoided, and consequently less fuel is required with betterresults in the smelting process.

It will further be seen that by applying the hood to existing furnaces alarge increase in available space in the upper end of the furnace isobtained, and this space can be utilized in the preparation of thecharge and has the same effect as increasing the height of the stack.Furthermore, this additional advantage could only be secured otherwiseby extending upward the shaft of the furnace and raising the feed-flooraccordingly, or by extending the shaft of the furnace above thefeed-door and connecting this superstructure with the flue by means of along downtake. In the latter case the hot gases would have to be drawninto the dust-chambers or flue by a long downtake and increased draftcapacity would be required for this purpose, besides the feed-floorwould be considerably obstructed and heated by the large superstructure.

By the device described the feed-door is not obstructed, and thecomparatively low hood takes up little room and does not'interfere withthe draft of the furnace.

Having thus fully described my invention,

ICO

I claim as new and desire to secure by Letters Patentl. Asmelting-furnace, comprising a stack, a dust-chamber separate from thestack, a downtake-flue communicating with the dustchamber and extendingupwardly and inwardlytoward the stack and connected thereto, thedowntake-ue extending farther upwardly parallel with the stack andhaving its upper end level with the mouth of the same, a hood embracingthe mouth of the stack, and a iiue communicating with the hood andprojecting outwardly and downwardly, said lue being in communicationwith the upper end of the downtake, substantially as described.

2. A slnelting-furnace comprising a Stack having an open upper end ormouth and an outlet-opening in its side, a dust-chan1ber, a downtake-uecommunicating with the dustchamber and extending up and havingcommunication with said outlet-opening of the stack, the downtake-fluealso having an open upper end adjacent to the upper end of the stack,and means for connecting the mouth of the stack with the upper end ofthe downtake-flue, substantially as described.

3. A smelting-furnace comprising a Stack having an open upper end ormouth, a downtake-ilue having an open upper end adjacent to the mouth ofthe Stack, angular sockets fixed to the mouth of the stack, a hoodhaving a form at its base conforming to the disposition of the socketsand removably held by the same, and a flue extending from the top of thehood and communicating therewith, the said liue being in communicationwith the downtake-ue, substantially as described.

HERMAN HUBER.

Vitnesses:

XVM. B. REED, FRANK PITTMAN.

